Trixie is a Mii from the Switch.
Trixie originally appeared as the default Mii for Elven Retreat's Mischievous Witch role in the files of Miitopia (Switch, Demo), but unused within the demo itself. She later appeared in the full game of Miitopia (Switch). Once the player replaces her with a Mii of their choice, Trixie would never appear again, unless that Mii is deleted. Her Mii data file can be found in \cmn\storedata\npc_default_mii.sarc and is named Town02_Imp.charinfo.
Her Mii name in her Mii data file is いたずら, which translates to "mischief". Her height is set to 108 and her build is set to 29. Her Mii ID is as follows: 80 03 9C 66 88 A3 43 4C 9D 27 56 FD EF EF EC 39
Her Mii data file does not contain any unused Mii data.
Trixie's role in Miitopia (the Mischievous Witch) is described as so:
Her magical abilities are limited
exclusively to pranks. Shame.
She seems to bear resemblance to a Mii featured in Miitopia (3DS) promo art, as it seems a handful of the Miitopia Switch default Miis were based around Miis that appeared in promo art for the original game, but it's unconfirmed if Trixie and the promo art Mii are meant to be the same character.
The names of the default Miis in Miitopia Switch often vary drastically depending on region. Trixie's name on the Mii Library is going off of the US English version, for consistency. A chart containing all of Trixie's names is located at the bottom of this page.
Trixie unfortunately does not appear in any promo art. Below is a screenshot of her in-game as her role in Miitopia.
While Trixie herself does not appear in any official promo art, a very similar Mii does appear in promo art for Miitopia (3DS), where she's given the Cleric job. The USA and JPN versions of the promo art are also slightly different, so both have been included here, but Trixie seems to be based on the JPN version. Note differences in her design, like hair color.
This Mii originally appeared on the Switch!
Here's how to recreate them on the Switch:
Names in other languages
US English: Trixie (pun on the word "tricks")
US French: Farcia
US Spanish: Morgana
EU English: Trixie
EU Dutch: Trixie
EU French: Farcia
EU German: Trixie
EU Italian: Megera
EU Spanish: Morgana
JP Japanese: チャメ (Translates to "Chame")
KR Korean: Trixie
CN Chinese: Trixie
TW Chinese: Trixie
Source: Miitopia (Switch, Demo)
Mii Studio code
Unfortunately, as the Switch no longer supports QR codes, the only way to obtain this Mii yourself directly is via importing them into your Mii Studio with this tool.
This is Trixie's Mii Studio code:
You can download Trixie's charinfo-format Mii data file here.